Compilare: user.cpp: In function ‘long long int lgpow(long long int, long long int, long long int)’: user.cpp:31:15: warning: unused variable ‘d’ [-Wunused-variable] long long d=0,ans=1; ^ user.cpp: In function ‘int main()’: user.cpp:50:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:54:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%lld%lld%lld",&a,&b,&mod); ^